FRP设计参数对砌体拱加固作用的有限元研究
发布时间：2018-08-07 22:07
【摘要】：拱桥是一种历史悠久又充满生机的桥梁形式。目前,我国存在不少年代久远并且仍然正发挥交通功能的砌体古桥,它们是重要的历史文化遗产,对其维护加固非常重要。最近几年,FRP在加固工程上的应用和研究逐渐升温,其应用在砌体拱结构的研究也逐渐展开。FRP加固砌体拱的效果和破坏模式理论分析上已经取得一定的成果,但是对于FRP的设计参数改变对加固效果的影响研究则相当匮乏。而且,大部分取得的研究成果是实验室试验研究取得,在数值模拟方面研究方面还不成熟。本文以Oliveira教授试验的加固砌体拱为参照,用ABAQUS建立有限元模型。FRP的粘贴宽度和粘贴位置作为变量,分别建立起7个有限元模型并施加荷载进行计算。一个是未加固砌体拱结构,其他六个分别拱腹、拱背加固60mmm、140mm三种不同FRP宽度的加固拱,组成六个FRP加固砌体拱方案。对实验得到的荷载位移数据进行分析,结果显示FRP加固效果明显,所有加固拱的荷载能力和变形能力都得到提高。实际工程中选择桥梁加固方案时不但要考虑加固有效性,还需要考虑加固方案的经济性。价值工程可以将技术与经济手段相结合,针对FRP粘贴宽度和位置的设计进行分析,合理的控制工程成本,节约资源。因此,为了得出最优加固方案,本文对六个加固方案进行了价值分析。
[Abstract]:Arch bridge is a bridge form with a long history and full of vitality. At present, there are many ancient masonry bridges which are old and still exerting traffic function in our country. They are important historical and cultural heritage, so it is very important to maintain and reinforce them. In recent years, the application and research of FRP in strengthening engineering has gradually increased, and its application in the study of masonry arch structure has gradually expanded. The theoretical analysis of the effect and failure mode of strengthening masonry arch with FRP has made certain achievements. However, the research on the effect of FRP design parameter change on reinforcement effect is rather scarce. Moreover, most of the research results are laboratory experiments, but not mature in numerical simulation. In this paper, the reinforced masonry arch tested by Professor Oliveira is taken as a reference, and the finite element model is established by ABAQUS. The paste width and the paste position are taken as variables, and seven finite element models are established respectively and calculated under load. One is the unreinforced masonry arch structure, the other six are respectively arch abs, and the arch back is strengthened with 60mm mm-140mm three kinds of different FRP widths, and six FRP reinforced masonry arch schemes are formed. The experimental data of load and displacement are analyzed and the results show that the effect of FRP reinforcement is obvious and the load capacity and deformation capacity of all strengthened arches are improved. It is necessary to consider not only the effectiveness of reinforcement, but also the economy of reinforcement scheme in practical engineering. Value engineering can combine technology with economic means, analyze the design of FRP paste width and position, control project cost reasonably and save resources. Therefore, in order to obtain the optimal reinforcement scheme, this paper analyzes the value of the six reinforcement schemes.
【学位授予单位】：广东工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.72;U448.22
本文编号：2171497
[Abstract]:Arch bridge is a bridge form with a long history and full of vitality. At present, there are many ancient masonry bridges which are old and still exerting traffic function in our country. They are important historical and cultural heritage, so it is very important to maintain and reinforce them. In recent years, the application and research of FRP in strengthening engineering has gradually increased, and its application in the study of masonry arch structure has gradually expanded. The theoretical analysis of the effect and failure mode of strengthening masonry arch with FRP has made certain achievements. However, the research on the effect of FRP design parameter change on reinforcement effect is rather scarce. Moreover, most of the research results are laboratory experiments, but not mature in numerical simulation. In this paper, the reinforced masonry arch tested by Professor Oliveira is taken as a reference, and the finite element model is established by ABAQUS. The paste width and the paste position are taken as variables, and seven finite element models are established respectively and calculated under load. One is the unreinforced masonry arch structure, the other six are respectively arch abs, and the arch back is strengthened with 60mm mm-140mm three kinds of different FRP widths, and six FRP reinforced masonry arch schemes are formed. The experimental data of load and displacement are analyzed and the results show that the effect of FRP reinforcement is obvious and the load capacity and deformation capacity of all strengthened arches are improved. It is necessary to consider not only the effectiveness of reinforcement, but also the economy of reinforcement scheme in practical engineering. Value engineering can combine technology with economic means, analyze the design of FRP paste width and position, control project cost reasonably and save resources. Therefore, in order to obtain the optimal reinforcement scheme, this paper analyzes the value of the six reinforcement schemes.
【学位授予单位】：广东工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.72;U448.22
【共引文献】
相关硕士学位论文 前3条
1 王剑;钢拱桥极限跨径研究[D];重庆交通大学;2012年
2 郭亮;粘贴CFRP多孔砖墙低周反复荷载作用抗剪性能试验研究[D];东北林业大学;2013年
3 买尔旦·赛皮丁;网状FRP增强砖砌体轴心受力性能试验研究及有限元分析[D];新疆大学;2014年
，本文编号：2171497
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